After a statement win for the defending NBA champs in Game 3 on Friday, Portis was talking about his mindset in the laugher.
He had 18 points and 16 rebounds in just 25 minutes as the replacement for Khris Middleton (knee) in the starting lineup.
Williams took two more shots in the second quarter as the Bucks stretched the lead to 60-41 at halftime, all but ending any hopes the Bulls had of taking control of the series.